ASHRAEonUVGI2014

KeithJordanSanuvoxTechnologieskjordan@sanuvox.com

The agenda

ASHRAE:UVGI

1)SCIENCEOFUVC

2)INDUCTAIRPURIFICATION

3)UPPERROOMUVGI

4)EVAPORATORCOILUVGI

5)HOSPITALACQUIREDINFECTIONSANDUVGI

Using UV - Air Purification ASHRAE Past, Present & Future2005: ASHRAE Technical Group 2.UVAS

2008: First Handbook chapter: UVC Lamp Systems: Chapter 16

2011 Handbook: HVAC Applications : Chapter 60: Ultraviolet Air and Surface Treatment Applications

2012 Handbook: HVAC Systems and Equipment: Chapter 17: Ultraviolet Lamp Systems which includes information from Research Project 1509-RP on the degradation of Typical HVAC Materials, Filters and Components Irradiated by UVC Energy.

2012: ASHRAE IAQ Guide: Best Practices recognizes the use of UVC Lamp Systems

Moving Forward:More Research Projects Expanding the knowledge base of UVCEstablishing Performance Standards and Testing for UVC

Using UV - Air Purification

PerpendicularPlacement ParallelPlacement

2 year double blind office study - McGill University and Lancet Medical Journal 2000

Using UVGI for Air Sterilization - EPA/Homeland Security 2008

Report on Assessment of Germicidal UV Lights in the Sputum Induction Room at the Montreal Chest Institute. McGill University 2000

Effect of Ultraviolet germicidal irradiation in the heating, ventilation and air conditioning system on ventilator associated pneumonia in a neonatal intensive care unit Journal of

Perinatology. 2011

Home Isolation & use of portable HEPA/UVGI units Toronto Public Health. Nov. 2012

UVC: Florida Hospital Puts HVAC Under a New Light, Engineered Systems Feb. 2003

Guidelines on the Design and Operation of HVAC Systems in Disease Isolation Areas, TG 252. Nov. 2000 - US ARMY

Advanced HVAC Systems for Improving Indoor Environmental Quality and Energy Performance of California K-12 School. Applications Guide for Off the Shelf Equipment for

UVC Use. May 2006

CDC: Guideline for Disinfection and Sterilization in Healthcare Facilities, 2008

Life-Cycle Cost Simulation of In-Duct Ultraviolet Germicidal Irradiation Systems. 2011

The Importance of Bioaerosols in Hospital Infections and the Potential for Control using Germicidal Ultraviolet Irradiation. 2004

Using UVGI to counter contaminant dispersion. IFHE Digest 2011

The Application of Ultraviolet Germicidal Irradiation to Control Transmission of Airborne

Suns UV rays

How UV Works

UV Causes MicroorganismTo Stop Functioning Properly

More Importantly DestroyingBio-Contaminants Greatest WeaponThe Ability to Reproduce

Micro-organism Susceptibility to UVC

Aspergillus Niger 330,000

%Disinfection

UVGI Lamps

- Mercury, Xenon, Argon Gas Mixture- Quartz to allow transmission of UVC- Doped to emit 254nm specifically- As gas mixture uses itself up, replacement

of lamp is necessary- 1 year or 2 year lamps

Lamp Cooling and Lamp Fouling

The two greatest factors that influence the efficiency of a UV Lamp are:

A) Lamp Cooling

B) Lamp Fouling

Using UV In Duct Air Purification

- Return or supply duct - Treat entire wing/multiple rooms with a single install- Airborne UV Disinfection to protect occupants and vaccinate the building.

Using UV In Duct Air Purification

VariablesforSizingforAirSterilization

Dimensionoftheinstallationpointinduct:WxH

Volumeofairpassingthroughduct

Upper Air UV

Upper Air UV

Typically installed on a wall above seven feet, the louvers reflect the UV to the upper air region of the space.

As air currents bring bacteria to the upper air of the space, they are irradiated with UVC

One of the first type UV systems, they faded in use, and now have made a resurgence because of Multi-drug resistant organisms and Hospital Acquired Infections.

Most cases, more than one unit is needed in a room to adequately cover the space.

Typically used in TB applications

Sizing: Room dimensions and contaminant to be irradiated

Evaporator Coil UV

UVGIforCoilCleaning BenefitsInclude: Destroys mold and other microbial growth (bio-film) on the

evaporator coil as well as biological odors

Potential energy savings (average 5-15%) from a consistent, clean coil

Eliminates coil maintenance as pressure washing can damage the coil fins and impact debris in the center of the coil

Eliminates need for Drain Pan Tabs

Can reduce static pressure (w.g.) through coil

Improve cooling transfer efficiency

Potentially raise cooling tower water temperature

Potentially lengthen the lifespan of the coil by eliminating corrosive Biofilm

University tested & published results in The Lancet Medical Journal- 99% microbial and endotoxin reduction in AHU - 40% reduction in respiratory illness- 20% reduction in all worker symptoms reducing abenteeism

**The lines in the agar are the impressions made from pressing the plates against the fins of the coil

**After 10 hours of UV exposure

(Incubation 4 days)Before UV

(Incubation 4 days)

The results are always the same.

Using UV Indoors Object Purification

BothSideswillkeepacoilclean Downstreamvs.UpstreamWepreferUpstreamasafirstchoice.

Using UV Coil Sizing

SizingPerformance Upstream sizingforCoil140Wx120H

UV Hospital Acquired infections

InfectionPrevention:TheThreatofDirtyAir